Sun Valley, ID is America’s ORIGINAL MOUNTAIN PLAYGROUND with near limitless opportunities. We've narrowed down the list down to highlight our top 15 things you must do in Sun Valley this winter. Whether you are up for a grand adventure outdoors, or prefer a mellower pace around town, there's bound to be something to match your cadence. Here are a few of our favorites--feel free to mix and match to create your ideal Sun Valley getaway.